Ductile Iron ASTM A536 80-55-06

Designations: A536 80-55-06 · UNS F33800 · SAE J434 D5506 · EN-GJS-600-3ASTM A536 Grade 80-55-06 is a pearlitic ductile iron, specified where a casting needs more strength and wear resistance than the ferritic grades and can accept lower elongation. The grade name gives its minimums: 80 ksi tensile, 55 ksi yield and 6% elongation. It is used for gears, crankshafts, heavy-duty housings and machine parts. Kormax casts A536 80-55-06 to order for customers in the United States and Canada.

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Chemical Composition

Ductile Iron ASTM A536 80-55-06 — chemical composition, % by weight
Element	Symbol	Range / limit %
Carbon	C	3.5–3.9
Silicon	Si	1.9–3.0
Manganese	Mn	0.15–0.35
Copper	Cu	0.30–0.80
Nickel	Ni	0.05–0.20
Magnesium	Mg	0.03–0.06
Phosphorus	P	0.05 max
Sulfur	S	0.025 max
Iron	Fe	Balance

Mechanical Properties

Ductile Iron ASTM A536 80-55-06 — mechanical properties
Property	Metric	Imperial
Tensile Strength, min	552 MPa	80 ksi
Yield Strength, min	379 MPa	55 ksi
Elongation, min	6%	6%
Hardness (Brinell), typical	187–255 HB	187–255 HB

ASTM A536 specifies tensile, yield and elongation; the grade name gives them. Hardness is typical (SAE J434 D5506 range). Composition is Kormax typical foundry practice; ASTM A536 does not specify chemistry.

Comparable and Related Specifications

The standards and grades below may have similar composition, properties or applications, but they should not be treated as direct equivalents without review. Chemistry, heat treatment, toughness requirements and testing provisions can differ between standards.